Valve and machine co



(No' Model.) 2 Sheets-Sheet 1.

0. BROMLEY.

VALVE.

Patented Nov. 9, 1897.

WITNESSES:

UNITED STATES PATENT QEEICE.

ROBERT C. BROMLEY, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR TO THE PITTSBURG VALVE AND MACHINE 00., LIMITED.

VALVE.

SPECIFICATION forming part of Letters Patent No. 593,412, dated November 9, 1897'. Application filed December 10, 1896. Serial No. 615,169. (No model.)

all whom it may concern: 12 is screwed into the under center of the Be it known that I, ROBERT C. BROMLEY, a head and forms a bottom for the nut 11, so citizen of the United States, residing at Pittsthat when the plug is rotated in the direction burg, in the county of Allegheny and State of of the arrow, Fig. 3, the nut will be thrown 5 Pennsylvania, have invented or discovered a down against the follower, as shown in Fig. new and useful Improvement in Valves, of 1, and a pressure will be exerted upwardly which the following is a full, clear, and exact upon the plug to bind it to its seat.

description, reference beinghad to the accom- By means of the very delicate adjustment 6o panyin g drawings, forming part of this appliof which the follower 12 is capable the bind- 10 cation, in which ing action of the plug can be so accurately Figure 1 is a central vertical sectional view adjusted as to occur only at the end of the of avalve madein accordance with my inventhrow, and at the same time will limit the tion. Fig. 2 is a similar view showing the throw by preventing further rotation due to plug turned to register with the openings in such binding action. Upon reversing the 15 the valve-casing. Fig. 3 is across-section movement of the plug the binding pressure taken on the line III III of Fig. 1. Fig. 4 is will be immediately released. In order to a detail view in elevation of the lower porhold the plug to its seat at all times with a tion of the plug. Fig. 5 is a view similar to moderate pressure, ports 13 are made, com- Fig. 1, but showing a modified construction municating with the central opening 5 and .20 of adjusting device. Fig. 6 is a cross-section leading upwardly and downwardly, supplying taken on the line VI VI of Fig. 5, looking uppressure upon the shoulders 1 115 of the plug, wardly. Fig. 7 is a similar view on the same the lower of which (in Fig. 5 the upper) by line, looking downwardly. reason of its greater area will receivea greater My invention consists of an improvement pressure, and such excess of pressure will 25 in valves, and relates more particularly to the serve to always keep the valve to its seat.

means for limiting the throw or travel of the A packing-ring 16, interposed between the valve-plugand forsetting ittightlyto its seat, flanged base and head 10 and embracing together with means for adjusting and taking the extension 8, makes a tight joint against up the wear of such mechanism without releakage.

30 moval of the plug or any of the parts. In Fig. 5 I have shown a modified construc- Referring to the drawings, 2 is the Valvetion in which the plug is tapered downwardly, casing, provided with suitable inlet and outand the casing is provided with an externallylet ports and a central tapered seat 3. Withthreaded extension l7, through the center of in the casing is the plug 4, tapered to correwhich the threaded teat 9 projects, and hav- 3 5 spond to the seat 3 and provided with the lating a bearing-face 18, upon which the nut 11 eral opening 5, coinciding with the inlet and bears. A hood 19 is made with a polygonal outlet ports when in an open position, as pocket 20, adapted to embrace the nut and shown in Fig. 2, and adapted to close such prevent its rotation, while the hood is held in 0 ports when turned at right angles, as in Fig. 1. position by a flanged union 21, screwed upon 0 An extended stem 6 projects upwardly the threaded extension 17. The lower edge through a suitable stuffing-box forming a part of the extension 17 andth'e upper surroundof the valve-casing, in the bottom of which is ing edge of the hood 19 are provided with placed a suitable gasket 7, while at the botsimilar serrations or corrugations 22 23, intertom the plug is provided with a short extenfitting, and when clamped together by the 5 sion 8 of reduced diameter, terminating in a union 21 the hood 19 is effectually prevented screw-threaded teat 0. from turning. By partially unscrewing the The base of the valve-casing is flanged, and union the hood 19 may be rotated, and with it securedthereto by bolts is a lower head 10, the nut 11, for adjustment or taking up wear, in the center of which is a polygonal opening whereby the nut may be adjusted to any de- 50 forming a pocket for a nut 11, screwed upon sired degree of pressure upon the threaded the teat 9 and held against rotation by the teat 9, so as to very accurately regulate its polygonal pocket in the head 10. A follower downwardly-exerted pull upon the plug.

The operation of my device is obvious, and its especial advantages of nicety of adjustment and means for taking up wear will commend it to those accustomed to use valves for high pressures.

I am aware that valves have been made with threaded stems and nuts thereon held against rotation and am familiar with the patents issued to H. E. Keyes July 30, 1895, for such devices; but my invention possesses features of novelty and advantage not heretofore introduced in devices of this character. It will be observed that the adjustments of the nuts can be easily and. quickly accomplished without entirely removing any of the parts, such adjustment being made by means of the outer inclosing and embracing portions of the valve-case, as has been described, and such features of advantage I consider important and valuable.

A further modification of my invention, employing the constructions of Figs. 1 and 5, respectively,above and below the plug, where? by it would be limited as to its throw in either direction, can be made with advantage, and such a construction is contemplated by me and is within the scope of the presentinvention.

Having described my invention, what I claim is 1. A valve having achambered tapered plug, provided with a valve-stem and an externally-threaded extended teat on the op-] adjustable follower mounted in the surrounding holder and forming a backing for the nut, substantially as set forth.

3. A valve having a chambered tapered plug, provided with a valve-stem and an externally-threaded extended teat on the opposite end of the plug, a polygonal nut engaging the threaded teat, a surrounding holder for the nut to prevent its rotation, and a follower, screw-threaded into an extension of the surrounding holder and forming a backing for the nut, substantially as set forth.

In testimony whereof I have hereunto set my hand this 2d day of October, 1896.

ROBERT C. BROMLEY.

Witnesses:

PETER J. EDWARDS, 0. M. CLARKE. 

